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Physics: Principles with Applications
An ocean fishing boat is drifting just above a school of tuna on a foggy day. Without warning, an engine backfire occurs on another boat 1.55 km away (Fig. 12$-$33). How much time elapses before the backfire is heard ($a$) by the fish, and ($b$) by the fishermen?
FIGURE 12–33 Problem 5. (Figure can't copy)